Vibrator



M. GILSON VIBRATOR June 29, 1933.

Filed May 4, 1929 Patented June 20, 1933 inure STATES PATET F lfitlMICHAEL GILSON, OF PORT WASHINGTON, WISCONSIN, ASSIGNOR 'IO KWIK-MIXCGNORETE MIXER 00., OF PORT WASHINGTON, WISCONSIN, A CORPORATION OFWISCONSIN VIBBATOB Application filed May 4,

This invention relates to new and useful improvements in vibrators andmore particularly to a vibrator adapted to be used in connection with aconcrete mixer.

As a general rule in concrete mixers the material which is being fed tothe mixing drum by means of a hoppercd bucket has a tendency to stick tothe discharge hopper of the bucket and has to be jarred loose bypounding on the bottom of the bucket and the chute portion so that itmay be discharged into the drum.

One of the objects of 'my invention is the provision of a novel type ofvibrator adapted to be used in connection with motor-driven concretemixers so positioned as to operate directly on the chute whichdischarges the material from the loading bucket into the drum, and ismanually controlled so that when the material is being discharged fromthe loading bucket the device can be thrown into operation to provide acontinuous tapping on the discharge chute of the bucket to prevent thematerial from sticking to the bottom of the same.

Another object of my invention is the provision of vibrating device asset forth above which is mounted on a movable frame for the loadingbucket and which is so constructed and arranged that when the bucket israised to a discharging position the device can be manipulated formoving the same into operative connection with the drivmg shaft of theconcrete mixer so that a continuous tapping may be imparted to thedischarge chute of the loading bucket and prevent the material fromsticking thereto so as to cause 1t to be discharged-into the mixingdrum.

A further object of my invention is the provision of a vibrator as setforth above which is normally urged into an inoperative position andmaintained in this position untll manually actuated for moving the sameto an operative position when required.

lVith the above and other objects in View, the invention consists in thenovel features of construction, the combination and arrange ment ofparts hereinafter more fully set forth, pointed out inthe claims andshown in the accompanying drawing wherein:

Fig. 1 is a rear elevation of a portion of a concrete mixer illustratingthe application of my improved vibrator;

Fig. 2- is a detailed side elevation of the loading bucket illustratingan end view of the vibrator.

Referring now more particularly to the drawing, it will be noted that Ihave illus trated one of the side rails of the supporting frame for aportable concrete mixer, the rails being generally indicated at 1. Inthe construction of certain types of concrete mixers, the loading bucket2 is supported by means of the side bars 3 which are secured tothe sidesof the bucket and diverged into parallel ends, as shown at tt. Theseparallel ends are pivotally mounted upon a shaft 5 supported upon theside rails 1 by the bearings 6.

While only a small portion of the hoppered part of the loading bucket isdisclosed, it will be apparent that this bucket is raised and lowered inthe same manner as the ordinary loading bucket of a concrete mixer.

T he parallel end portions of the members 3 are provided with bearings7, which support a slidable and rotatably mounted shaft 8, a stop collar9 being mounted upon the shaft for engagement with one of the bearingsto limit the movement of the shaft in one direction, a second collar 10being mounted upon the shaft adjacent the other side rail and normallyspaced from one of the bearings by means of a coil spring 11 which has atendency to normally maintain the shaft 8 in an inoperative position.

Mounted upon the shaft 8 between the bearings 7 and mixed thereto is asleeve 12 which has extending from one side thereof an arm 13 supportingupon its outer end a removable head 14 which is adapted to contact witha small plate 15 secured to the bottom of the discharge chute 16 of theloading bucket. Extending outwardly at an angle from the sleeve 12 atthe opposite side from the arm 13 is an arm 17, the outer end of whichcarries a coil spring 18 bearing against a face plate 19, secured to thesupporting cross-piece 20. The ends of the cross-piece 20 are attachedin any suitable manner to the parallel portions 4 of the side bars 3 andit will be noted that the plate 19 has a smooth bearing surface so thatthe end of the coil spring 18 which engages the same will readily movethereover.

Attached to the outer end of the drive shaft 26 of the motive powerwhich operates the concrete mixer is a four-point tappet 21 adapted toengage the contact finger 22 of the arm 23 which is connected to one endof the shaft 8, this operation rocking the shaft 8 in its bearing 7. Itwill, however, be observed that normally the coil spring 11 maintainsthe shaft 8 in an inoperative position or in such position as to preventthe contact points of the tappet from engaging the finger 22, but whenit is desired to impart a rocking movement to the shaft 8 the hand-wheel24:, which is secured to the outer end of the shaft, may be grasped bythe operator to move the shaft longitudinally in its bearings so as tobring the finger 22 into the pathway of the points of the rotatingtappet 21. In the drawing the numeral 25 designates a conventionalshowing for the power plant of the mixer upon whose drive shaft 26 thetappet 21 is mounted and continuously driven. This operation will imparta rocking movement to the shaft 8 and cause the head 14 to becontinuously brought into contact with the plate 15 and moved away fromthe same so as to impart a continuous tapping movement to the chuteportion 16 of the bucket 12.

It will also be noted that since the shaft 8 and its associated partsare mounted on the bucket arms 3 they will move therewith to and fromdischarging position and that the normally inoperative position of thefinger 22 relative to the tappet 21 ofiers no interference to thismovement.

From the above description, taken in connection with the drawing, itwill be readily apparent that I have provided an improved vibratordevice which can be quickly and readily attached to various well-knownmakes of concrete mixers so as to impart a continuous tapping movementto the chute of the loading bucket when the same is in position todischarge the contents thereof into the mixing drum.

I claim:

1. In a device of the class described, the combination of a slidably androtatably mounted shaft, an arm projecting from one side of the shaft, ahead on the outer end of the arm, a rotatable tappet, means on the shaftadapted to be moved into the path of the tappet whereby to impart arocking movement to the shaft, and means for moving said first means outof the path of the tappet.

2. In a device of the class described, the combination of spacedsupporting members, bearings carried thereby, a shaft slidably androtatably mounted in the bearings, collars carried by the shaft with oneof said collars engaging one of the bearings to limit the movement ofthe shaft in one direction, a coil spring on the shaft between the othercollar and bearing for normally urging the shaft in one direction, anarm projecting from the shaft between the collars, a head on the arm,means whereby to move the shaft longitudinally against the tension ofthe spring, means for imparting a rocking movement to the shaft whenmoved against the tension of the spring, the tension of the springreturning the shaft to its normal position upon release of the firstnamed means.

3. A device of the class described, the combination of a supportincluding spaced bearings, a shaft longitudinally slidably and rotatablymounted in the bearings, means li1niting the movement of the shaft ineither direction, means operatively associated with said shaft in one ofits sliding positions whereby to impart a rocking movement to the shaftand inoperative in another of its sliding positions and a hammer-likemember carried by the shaft to be rocked with the same and to beintermittently engaged with an object in the path of the same.

i. In a concrete mixer charging device, a support including a poweroperated part, a charging device carried by the said support and movableinto loading and discharging positions, and a vibrating hammer devicefor vibrating the bottom of the bucket when the bucket is in dischargingposition to loosen any particles of the materials which may stick to thebucket, said hammer device being adapted to be engaged by the poweroperated part when the charging device is in the said dischargingposition to cause hammering action of the hammering device.

5. In a concrete mixer charging device, a support including a poweroperated part, a charging device carried by the said support and movableinto loading and discharging positions, a vibrating hammer device forvibrating the bottom of the bucket when the bucket is in dischargingposition to loosen any particles of the materials which may stick to thebucket, said hammer device being adapted to be engaged by the poweroperated part when the charging device is in the said dischargingposition to cause hammering action of the hammering device, and manualmeans for causing engagement of the hammer device with the poweroperated part when in the last position.

6. In a device of the class described, the

combination comprising a movable loading bucket, a motor driven shaftspaced apart therefrom, a rockable shaft carried by the loading bucket,a hammer-like member carried by the rockable shaft, a tappet carried bythe motor driven shaft, means on the rockable shaft adapted to be movedinto contact with the tappet to impart rocking movement to the rockableshaft and to impart an intermittent movement of the hammer-like memberagainst the bucket.

7. In a device of the class described, the combination comprising aloading bucket, a motor driven shaft spaced apart therefrom, a rockableshaft supported by the loading bucket, a hammer-like member carried bythe rockable shaft for contact with the bucket, an engaging fingercarried by the rockable shaft, a tappet carried by the motor drivenshaft for engagement with the finger to im part movement to the rockableshaft, manually operated means for moving the finger into the path ofthe tappet for rocking the shaft and imparting an intermittent movementof the hammer-like member against the bucket and means for moving thefinger outside of the path of the tappet upon release of the manuallycontrolled means.

8. In a device of the class described, the combination comprising amovable loading bucket adapted to be moved to discharging position, arockable shaft carried by said bucket, a hammer-like member extendingoutwardly from the shaft, power operated means adapted to transmitrocking movements spaced apart from said bucket, and means for movingsaid rockable shaft into or out of rocking engagement with said poweroperat- 3 ed means at will when the bucket is in dis charging positionfor intermittently engaging said hammer-like member with the bottom ofthe bucket. H 9. In a device of the class described, the combinationcomprising a loading bucket movable into loading and dischargingpositions, a bucket vibrating device carried by the bucket and adaptedto strike the bucket I when the vibrating device is operated, poweroperated means spaced apart from said bucket and adapted to transmitvibrating movements, and means for moving said bucket vibrating deviceinto and out of vibration i transmitting engagement with said poweroperated means at will when said bucket is in discharging position, saidpower operating means being rendered inoperative when the bucket is inleading position.

In testimony whereof, I aflix my signature.

MICHAEL GILSON.

